Product details:

Static Capacity - TJ50 Helps prevent upending semi-trailers when they are not connected to a tractor during loading and unloading operations. Also use to level trailers parked on sloped ground and to prevent landing gear from sinking into a soft surface. Meets OSHA Requirements 1910.178k3 that states "Fixed jacks may be necessary to support a semitrailer and prevent upending during the loading or unloading when the trailer is not coupled to a tractor.This jack has a removable pipe handle for quick 39-1/2to 51height adjustment with ratcheting screw mechanism. Permits worker to stay upright while operating acts as a steering lever. 14base provides maximum rigidity. 7-3/4top cap. Accommodates up to a 9 degree tilt-off level. Heavy-duty 8solid rubber transport wheels. 100000 lb. static capacity and 40000 lb. lifting capacity.